This bug was initially created as a light copy of Bug #1991739

I am copying this bug because: 
The resulting symptom is still showing up, with less frequency since the root cause is slight different, but still able to replicate on vSphere with a 4.7 cluster running WMCO 2.0.3.

Description of problem:
WMCO ignores the `Deleting` phase notification event for Windows machines without or invalid IPv4 address.

Version-Release number of selected component (if applicable):
WMCO 2.0.3 running on cluster with version 4.7.24 

How reproducible:
Sometimes, depends on platform performance while removing a virtual machine

Steps to Reproduce:
1. WMCO configured and running
2. Create a valid machineSet with 1 replicas
3. Observe the node information in the `windows-exporter` metrics endpoint object.
    Note the IP Addresses, for example: 172.31.251.250
4. Delete the machineSet
5. Wait for the Windows machine to disappear
6. Check one more time the `windows-exporter` metrics endpoint object, if there is still an entry in `Subsets` mapped to an IP address of a deleted machine, you have reproduced the bug. Metrics are no longer available for a deleted machine

Actual results:
WMCO with DEBUG logging enabled shows:
```
DEBUG   controller.windowsmachine   invalid Machine {
	"name": "winworker-rh5cr",
	 "error": "no internal IP address associated",
	 "errorVerbose": "no internal IP address associated, ...”
	...
}

```

The `windows-exporter` metrics endpoint object contains Subsets with an IP address of a deleted machine
```
$ oc describe endpoints -n openshift-windows-machine-config-operator
    Name:         windows-exporter
    Namespace:    openshift-windows-machine-config-operator
    Labels:       name=windows-exporter
    Annotations:  <none>
    Subsets:
      Addresses:          172.31.251.250
      NotReadyAddresses:  <none>
      Ports:
        Name     Port  Protocol
        ----     ----  --------
        metrics  9182  TCP

    Events:  <none>
```


Expected results:

WMCO with DEBUG logging enabled shows:
```
DEBUG controller.windowsmachine   machine not provisioned {
 	"windowsmachine": "openshift-machine-api/winworker-vdmnd",
	"phase": "Deleting"
}

INFO	metrics	Prometheus configured	{
 	 "endpoints": "windows-exporter",
	 "port": 9182,
	 "name": "metrics"
}

```

The IP Address of the deleted machine does not appears in the `windows-exporter` metrics endpoint object.
With replicas set to 1, the Subsets must have no entries, empty.
```
$ oc describe endpoints -n openshift-windows-machine-config-operator
    Name:         windows-exporter
    Namespace:    openshift-windows-machine-config-operator
    Labels:       name=windows-exporter
    Annotations:  <none>
    Subsets:
    Events:  <none>